Which is better longer xlr or speaker cable


I have just purchased my first mono amps (Nuforce Reference 9V2SE's) giving me some new cable options. Currently I run a one meter pair of XLR and then four 5 meter pairs, as I biwire, of speaker cable. With the mono's now I can also do a 5 meter xlr and short speaker cables.

Which should produce better sound. And for equal sound quality, which should be less expensive. Any recommendations for a reasonable cost way to do this? I would like to get in new or used for under $500 for whatever additional stuff I have to buy. In option one I will need new speaker cable, in option two, new IC xlr. Is it OK to have different lengths of cable, probably 3 meters to the closer speaker?
Thanks
128x128gammajo
Thank you all for your comments
Kirkus - you gave me many good considerations to think about. Drubin - I sure am finding that it is true that the market in used 5 Meter cable is very limited.

My summary impression is that of course cable quality matters and probably both long balanced IC or long speaker cable can work, and perhaps avoid long anything if possible. If I do go long IC I will definitely be at least at Morgami quality which seems like a great bargin at thier price.

My house is currently on the market and the non-dedicated listening room is staged for sale making placement of equipment ideal for looks and not for sound. Because this situation is temporary I am look at cheap alternatives now. Once I am settled in my new place I will have a dedicated listening space which I very much look forward to, so as to do proper room treatment and equipment placement - You all helped me think this through. I appreciate that very much.
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Balanced - Guitar Center or similar.

More then adequate for your situation and not to bad either.

Mariusz
TVAD MRJSTARK - Thanks for the further recommendations. I have not been able to find out how to price and purchase Oyaide through their website yet.
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